Lawn-mower.



J. G. CLARK.

LAWN MOWER.

APPLICATION FILED APR.4, 1914.

Patented July 21, 1914.

anon 11oz clJ ' always of a shape that will permit of my JOSEPH CHESTER CLARK, OF SAN ANGELO, TEXAS.

LAWN-MOWER.

Specification of Letters Patent.

Patented July 21, 1914-.

Application filed April 4, 1814. Serial No. 829,518.

To all whom it may concern:

Be it known that I, Josnrn C. CLARK, a citizen of the United States, residing at San Angelo, in the county of Tom Green and State of Texas, have invented certain new and useful Improvements in Lawn-Mowers, of which the following is a specification.

My invention relates to rotary lawn mowers and more particularly to the stationary blades, and has for its object the provision of a novel form of stationary or lower blade which is so constructed that one of its ends will be engaged by the rotating blades before contacting with the main or body portion, and form a guide for the rotary blades whereby they may contact closely with the main or body portion of the stationary blade insuring an easy rurming and a perfectl clean and smooth shearin of the grass, an prevent any shock, grin ing or clickin when the contact is made.

Other 0 jects and advantages such as my improved means for clamping the blade upon the holder frame, simplicity, eificiency, freedom from clogging, etc., will be brought out in the following specification and illustrated in the accompanying drawings, in'

which:

Figure 1 1s a plan view of a common lawn mower fixed blade holder to which my im-' proved blade has been applied, Fig. 2 is a similar view of the bottom side thereof, Fig. 3 is a vertical cross sectional view, and Fig. 4 is a perspective view of the stationary blade detached.

Referring more particularly to the drawings, the numeral 1 designates the ordinary bar carrying the stationary blade in'that type of lawn mower in which a pluralitv of spiral knives rotate and contact with a fixed blade for cutting grass. The bar 1 is provided with the usual openings 2 for the reception of the usual means for securin it to the body or frame of the mower. his bar 1 may vary in shape and size to some extent in various makes of mowers, but is mvention being applied thereto. 7

My improved blade comprises a main or body portion 3 formed of steel sufliciently thin to be somewhat yieldable. The longi tudinal edges 4 and 5 of the blade are square and are exactly the same on both sides, thereby providing two cutting edges 6 and 7. At the ends of the body portion 3 the blade is provided with extensions or tongues 8 and 9 adjacent the front edge 4 and rear edge 5, respectively. The tongue 8 is curved downwardly and the tongue 9 upwardly, as shown most clearly in Fig. 4. Both of these tongues are integral with the body portion 3 of the blade and are easily formed by cutting away a portion of the material. It will also be observed that these tongues are parallel with and, in fact, in alinement with the longitudinal edges 4 and 5. By this construction it will be obvious that the blade has exactly the same shape and appearance whether in the position shown in the drawings or if it be turned around or inverted, and that I have thus provided a blade which is absolutely reversible.

I preferably provide means whereby the blade may be secured upon the bar 1 without having any holes in the blade though it will be readily understood that any other suitable fastening means could be used without detracting from the spirit of my invention.' I prefer, however, to provide the bar 1 with a plurality of holes through which to pass the screws 10 which an age within the screw-threaded holes forme in the clamping plate 11 upon the lower side of the bar 1, and in practice I secure my improved blade upon the bar 1 by passing it between the bar 1 and the clamping plate 11 with one lon itudinal edge contacting, or nearly so, wit the screws 10, and then tightening the screws 10 until the blade is held firmly.

When my blade is attached as shown and described only one tongue, either the tongue 8 or 9, will extend beyond the forward longitudinal edge 4 or 5 of the blade, and by spacin the visible tongue from the forward edge 0 the bar 1 there is formed an opening as shown at 12. This opening-permits dirt and trash to pass through instead of being scooped up and carried into the machine where it would cause wear and clogging of the parts. i

It will be apparent that when in the operation of a mower equipped with my improved blade the spiral rotating blades contact with the curved tongue the yieldability of the blade will cause it to contact evenly, smoothly and snugly with the rotating blades, thus producing an ease of motion and certainty of cutting unobtainable in any other manner. It will also be apparent that my improved blade is reversible as both sides and edges are identical. Hence when one of the cutting edges, for instance the edge 6 on the longitudinal edge 4, becomes worn or dull, the blade may be reversed and the cutq ting edge 7 on the edge 5 used. By this constrnction of blade I provide a blade having twice the life 'of an ordinary blade.

Having thus described my invention what I claim is:

1. A stationary blade, for the purpose described, made of flexible material and having a tongue extending lengthwise from each end and parallel with the longitudinal edges of the blade.

2. In a lawn mower having a plurality of rotatin knives, a stationary blade comprising a at body portion and a downwardly curved tongue extending lengthwise from one end and adapted to becontacted with by said rotating knives.

3. In a lawn mower having rotating lmives, a stationary blade comprising a thin flat body portion rectangular in cross section, and a downwardly curved tongue extendin lengthwise thereof and parallel with the axis of said blade.

4. In a lawn mower having rotating knives, a stationary blade comprising a thin flat body portion rectangular in cross section, and a tongue extending lengthwise from each end and arallel with the longitudinal edges thereo? formed thereon.

5. In a lawn mower having rotating knives, a stationary blade comprising a thin flat body portion rectangular in cross section, and curved tongues extending len h wise from its end and arallel with the axis of said blade, one of said 'ton es being curved downwardly and the ot ii r curved upwardly. i

6. In a lawn mower having rotating knives, a stationary blade comprising a thin, flat, vyieldable b0 ortion and a tongue formed on each en t ereof, said tongue extending lengthwise from the ends of said blade and parallel with the longitudinal edges thereof, one tongue being curveddownwardly and the other upwardly, one edge of said downwardly curved tongue being a continuation of the forward longitudi nal edge and the corresponding edge of said other tongue being a continuation of the other longitudinal edge.

7. In a lawn mower having a frame, rotating knives mounted therein, and a transverse bar, a stationary blade comprising a thin strip of material provided with an u wardly. curved tongue extending longitu nally from one end and a downwardly curved tongue extending longitudinally from the other end, a plate upon the lower side of said bar adapted to overlap said blade, and screws passing through said bar and said plate. a

8. In a lawn mower having a frame, rotating knives mounted therein, and a transverse bar, a stationar blade comprising a thin strip of materia a tongue extending lengthwise from each of its ends, a plate upon'the lower side of said bar adapted to overlap said blade and one of said tongues, and screws assing through said bar 'and said plate; the other of said tongues being on the freeedge of said strip at its other end and curved downward 9. In a lawn mower aving rotary knives, a stationary blade comprising a thin, flat, yieldable bod portion and a tongue formed on each end t ereof; the tongue on one end bein a longitudinal extension of one side of the lade and approximately one-half of its width and the tongue on the other end being a longitudinal extension of the opposite side of sa d blade and approximately one-half of its width. I

' In testimon whereof I h reto aflix my signature in t e presence of. we witnesses.

J. A. Tnoms, Goa Jom.

' the longitudinal edge 4, becomes worn or fiat body portion rectangular in cross section, and a tongue extending flat body portion. rectangular in cross sectending lengthwise thereof and parallel with curved downwardly and the ot er curved Correction in Letters Patent No. 1,104,291.

dull, the blade may be reversed and the cutting edge 7 on the edge-5 used.- By this construction. of blade I provide a blade having twice the life of an'ordinary blade.

Having thus described my invention what I'claim is: y i r .1. A stationary blade, for the purpose described, made of flexible material and having a tongue extendin lengthwise from. each end and parallel with the longitudinal edges of theblade.

2. In a lawn mower having a plurality of rotatin knives, a'stationaryblade comprising a at body portion and a downwardly curved tongue extending lengthwise from one-end and adapted to becontacted with by said rotating knives. i

3. In a lawn mower having rotating knives, a stationary-bladecomprising a thin flat-body portion rectangular in cross section, and a downwardly curved tongue exthe axis of said blade.

4. In a lawn mower having rotating knives, a stationary blade comprising a thin lengthwise from each end and arallel with the longitudinal edges thereo formed thereon.

5. In a lawn mower having rotating knives, a stationary. blade comprising a thin tion, and curved tongues extending lengthwise from its endand arallel with the axisof said blade, one 0 said ton es being upwardly; '6. In a lawn mower having rotating knives, a statlona blade comprising a thin,

fiat, .yieldable (y 'rtion and a tongue formed on each en t ereof,said-to"ngue extending lengthwise from" the ends of said blade and. parallel .with the longitudinal edges thereof, one tongue curved- [sun] ing correction as follows: Page 2-, line 42,

downwardly and the other upwardly,one edge of said downwardly curved tongue being a continuation'of the forward longitudi nal edge and the corresponding edge of said other tongue beings. continuation of the other longitudinal edge.

7. In a lawn mower having a frame, r0- tating knives mounted therein, and, a transverse bar, a stationary blade comprising a thin strip of material provided with an upwardly. curved tongue extending longitudi nally from one end and a downwardly curved tongue extending longitudinally from the other end, a plate upon the lower side of said bar adapted to overlap said passing through said bar lengthwise from each of its ends, a plate uponthe lower side of said bar adapted to overlap said blade and one of said tongues, and screws passing thro h said bar and on the freeedge of said strip at its other 'end and curved downwardly. 9. In a lawn mower having rotary knives,

a stationary blade comprising a. thin, flat,

yieldable bodyportion and a tongue formed on each end thereof; the tongue on one end being a longitudinal extension of one side of the blade and approximately one-half of its width and the tongue on the other end being a longitudinal extension of the opposite side of said blade and approximately one-half of its width. I

' In testimony whereof Ih reto afiix my signature in the presence of vtwo witnesses.

, JOSEPH CHESTER CLARK.

Witnesses:

' J. A. Tnoms, 1 .Gns Jomzs.

It is hereby certified th atin Letters Patent No. 1,104,2Q1 granted' J 1914, upon the application of Joseph Chester Clark, of San Angelo,"Texas,-for an im- I proveme'ntin Lawn-Mowers, an error appears in the printed specification requir- .for. the word ftongue read and that the said Letters Patent should read with this oorrectiontherein that the sam e may conform to the record of the case in the Patent Oflice. V I

' Signed and sealed this 11th day of August A. 1)., 1914.

. 1 y Jujnnwrouf dilating ofPatentlsaid plate; the other of said tongues being I Qornectlon In Let -tefs PetntNp. 1,164,291.

It ie hereby certified thatin Letters Patent No. 1,104,291 reeted July 21, 1914,

hpon the applicapion of Joseph Chester Clark, of San Angelo,'Texas, for an improvement in Lawn-Mowers, au'er ror appears in the prihted specification requirjug correction as follows: Page 2-, line 42, .forlth'e "word ftongue read tongues;

ahd that the said Letters Patent should read with this correction therein that the salrfe may conform to the record of the eese in the Patenh Oflice.

Signed eed sealed this 11th day of Au eee A. 1)., 1914,

J. TINEWTON, I

[emu] 4mm Commissioner of Patents. 

